This page contains exploratory analysis for the acoustic backscatter data from CCES.

Data Overview

The CCES survey is conducted in two depth-stratified regions: the core area (bottom depth > 25 m, sampled by the Reuben Lasker or Bell Shimada) and the nearshore area (bottom depth < 15 m, sampled by fishing vessels). In this document, we have plotted the core and nearshore data together. For reference, JSOES sampling occurs from bottom depths of 18 m to 1465 m.

Distribution maps

In this document, I show the acoustic backscatter assigned to five species monitored by this survey:

  • Northern Anchovy Engraulis mordax
  • Pacific Sardine Sardinops sagax
  • Pacific Mackerel Scomber japonicus
  • Pacific Herring Clupea pallasii
  • Jack Mackerel Trachurus symmetricus

A sixth species, Pacific Round Herring Etrumeus acuminatus is also quantified, but does not occur in the Northern California Current and therefore is not pictured here.